Which property of an extrasolar planet CANNOT be determined using the Doppler effect?
A) orbital period
B) orbital distance
C) orbital speed
D) mass
E) radius

Question

Quizplus · Accepted Answer

The Doppler effect can determine the orbital period, distance, speed, and mass of an extrasolar planet, but it cannot determine the planet's radius directly. However, by combining the radial velocity measurements with independent measurements of the planet's transit (when it passes in front of its host star) and the star's size, scientists can derive an estimate of the planet's radius.

Which Property of an Extrasolar Planet CANNOT Be Determined Using